But I was referring about Alberts' passion for bicycle, Longjob's hard work dedication for his repair center and so on...
Like Geoffrey said you should give yourself a try, because maybe you already know it, but GB-580 is a competitor of garmin edge 500 which mean that there is no street map. And over all, the way it works is similar to your gps watch. So it's easier and straight forwarder to give good beta tester feedback when you already know Gs-sport product then when you are new to it. Even better if we have some beta tester that own both: gs-sport watch and the garmin device to make comparison.
Here are the accessories.
Ant+ heart rate monitor, wrist watch strap and speed and cadence sensors. That's the reason I am asking you Geoffrey if it wouldn't be more cost effective and simple if you include a speed and cadence combo instead of sending both separately?
For the handlebar mount, the manual said that it can be installed horizontally and vertically but if you mount it horizontally like I did, you will realize that there is no concavity to adapt it to the handle bar. My question is, is it possible to have both concavity in a "cross" shaped form so we can securely mount it in both way?
By the way, on my firmware, the buttons pattern are sometimes inverted when on the horizontal mode. Need more investigation, but you probably know it and already have corrected it in the next firmware.
Here you can see what it looks like on my hairy arm
And here a size comparison.